mary, we talked to the author of the article, nicole perlroth in the last hour. she said the paper kept it quiet for some time. because they were really just trying to figure out what was behind it all. what do we know now? >> right. suzanne, the times knew about i four months and they kept quiet until the hackers were blocked out of their system. this was a targeted attack and appears the hackers were looking for sources of a "new york times" investigative piece on the chinese prime minister. the times report said nothing sensitive from the piece was taken, but it said passwords for every employee were stolen. there security experts and they used techniques they said were similar to those used by the chinese military in the past. in a statement by the chinese foreign ministry, they said "all such alleged attacks are groundless, irresponsible accusations lacking proof or reliable research results. the times said they have gotten the hackers out of the system and security experts warn that they are likely to come back. >> i understand we are learning more about wh